Mitsubishi Grandis. Manual — part 613

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-550

connector (CAN2) terminal No.11

OK: 2

Ω or less

(5) Continuity between C-125 intermediate

connector terminal No.27 and C-09 joint
connector (CAN2) terminal No.22

OK: 2

Ω or less

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Are the check results normal?

YES :

<All the voltages measure 2

Ω or less> Go

to Step 37 .

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN2) and the
intermediate connector.

STEP 37. Resistance measurement at C-09 joint
connector (CAN2) and C-126 diagnosis
connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-8

.

CAUTION

The test wiring harness should be used. For
details refer to

P.54D-8

.

(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the
negative battery terminal. For details refer to

P.54D-8

.

(3) Ensure that the negative battery terminal is

AC312553

AC312553 AP

Harness side: C-09

Test
harness

Female side: C-125

Test harness

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310631AK

Connector: C-126 <RHD>

C-126 (B)

Harness side
(Front side)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-551

disconnected.

(4) Continuity between C-09 joint connector (CAN2)

terminal No.7 and C-126 diagnosis connector

terminal No.6

OK: 2

Ω or less

(5) Continuity between C-09 joint connector (CAN2)

terminal No.18 and C-126 diagnosis connector
terminal No.14

OK: 2

Ω or less

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Are the check results normal?

YES :

<All the resistances measure 2

Ω or less>

Diagnostics item 12: Diagnose shorts
between CAN_L and H lines. Refer to

P.54D-378

.

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN1) and the
diagnosis connector.

AC312553

Harness side: C-09

Test
harness

AX

Front side : C-126

Test
harness

AC312553 AZ

Front side : C-126

Test
harness

Test
harness

Harness side: C-09

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-552

Diagnostic Item 21: Diagnose the lines between the joint connectors (CAN1 and CAN2) <LH drive
vehicles>

CAUTION

When servicing a CAN bus line, earth yourself by
touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.

TROUBLE JUDGMENT

If the MUT-III cannot receive any signal from the
ABS-ECU and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, CAN bus line connector(s)
are broken or an open circuit has occurred.

COMMENTS ON TROUBLE SYMPTOM

The CAN bus line wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector.

ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>

COMBINATION
METER

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-553

POSSIBLE CAUSES

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Connector check: C-09 joint connector
(CAN2) and C-125 intermediate connector

CAUTION

The strand end of the twist wire should be within
10 cm from the connector. For details refer to

P.54D-8

.

When checking the joint connector, ensure that its
wiring harness side is not damaged.

Q: Are the check results normal?

YES :

Go to Step 2 .

NO :

Repair a defective connector or replace the
joint connector.

STEP 2. Resistance measurement at C-09 joint
connector (CAN2) and C-125 intermediate
connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-8

.

CAUTION

The test wiring harness should be used. For
details refer to

P.54D-8

.

(1) Disconnect the joint connector (CAN2) and the

intermediate connector, and measure at the
wiring harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the
negative battery terminal. For details refer to

P.54D-8

.

(3) Ensure that the negative battery terminal is

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310613

AD

Connector: C-125 <LHD>

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC

Short pin

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310613

AD

Connector: C-125 <LHD>